What a fucking cope. God forbid I don't want a Love Interest to have cheated on the MC, it's almost like there's a specific three letter tag for that which most people don't like. And no, I'm not saying that tag should be applied to this game, but the principle is the same, because it involves a LI cheating on the MC. Also, there is a big difference between a LI having a previous relationship and a LI cheating on the MC. There is yet another difference between a LI cheating on the MC, and forcing the MC to get back with said cheater in an unavoidable flashback.
It's not too close to reality, because in reality, I wouldn't even entertain the idea of getting back with a bitch who cheated on me, under any circumstance. The problem is that it's forced, obviously I'd rather it didn't happen at all if she's going to be a LI, but since it did happen and she is, allegedly, a LI, I would simply prefer if the MC wasn't forced to have hooked up with her after she hopped onto Steve's dick.